山东哪个城市有温泉:句型转换

来源：百度文库 编辑：高校问答 时间：2024/05/02 18:37:22
Bill could swim when he was only four.
Bill ___ ___ ___ swim at the age of four.

was able to

was able to

句型转换 句型转换. 句型转换 句型转换 句型转换 句型转换 句型转换！！！ 句型转换 句型转换: 句型转换